Writing signal timer output circuit which includes a bistable ti

Details Writing signal timer output circuit which includes a bistable ti Writing signal timer output circuit which includes a bistable ti

1998-06-12

2000-12-19

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327210, 3652257, 365194, H03K 3356

Patent

active

061631914

ABSTRACT:
In a non-volatile memory capable of electrically rewriting data, a timer circuit for determining writing time that is operable at any time at a voltage of under 1.0 V. The timing circuit has a regulated voltage circuit for outputting a regulated output voltage no greater than 1.0 V, a constant current circuit for producing a constant current having a value determined by the regulated output voltage, a voltage comparing circuit for comparing an input voltage input to one terminal with a reference voltage input to another terminal, and a capacitive element connected to a constant current output terminal of the constant current circuit. A connecting point of the constant current output terminal of the constant current circuit and the capacitive element is connected as the input voltage to the voltage comparing circuit, so that a desired time period is determined by comparing a voltage to the terminal of the voltage comparing circuit connected to the capacitive element with the reference voltage connected to the other terminal of the comparing circuit.

REFERENCES:
patent: 5384505 (1995-01-01), Takahashi
patent: 5469100 (1995-11-01), Wuidart et al.
patent: 5650739 (1997-07-01), Hui et al.
patent: 5936451 (1999-08-01), Phillips et al.

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